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OTHER INTANGIBLE ASSETS, NET
 9 Months Ended
Sep. 30, 2019
Intangible Assets, Net (Excluding Goodwill) [Abstract]  
OTHER INTANGIBLE ASSETS, NET OTHER INTANGIBLE ASSETS, NET
 
The following tables present the cumulative composition of the Corporation’s intangible assets:
September 30, 2019December 31, 2018
(In thousands)GrossAccumulated AmortizationNetGrossAccumulated AmortizationNet
Technology$243,782  $(134,274) $109,508  $238,212  $(123,156) $115,056  
Customer related intangibles375,218  (207,806) 167,412  358,832  (193,455) 165,377  
Programs (1)
144,000  (10,800) 133,200  144,000  (5,400) 138,600  
Other intangible assets41,274  (30,936) 10,338  40,340  (29,806) 10,534  
Total$804,274  $(383,816) $420,458  $781,384  $(351,817) $429,567  
(1) Programs include values assigned to major programs of acquired businesses and represent the aggregate value associated with the customer relationships, contracts, technology, and trademarks underlying the associated program. 

During the nine months ended September 30, 2019, the Corporation acquired intangible assets of $26.0 million. The Corporation acquired Customer-related intangibles of $18.9 million, Technology of $6.3 million, and Other intangible assets of $0.8 million, which have a weighted average amortization period of 14.6 years, 15.0 years, and 8.0 years, respectively.

Total intangible amortization expense for the nine months ended September 30, 2019 was $34 million as compared to $33 million in the comparable prior year period.  The estimated amortization expense for the five years ending December 31, 2019 through 2023 is $45 million, $43 million, $41 million, $39 million, and $35 million, respectively.